God hath sent forth the Spirit of His Son into your hearts, crying, Abba, Father. – Galatians 4:6

Where the Holy Ghost enters there is a cry. “God hath sent forth the Spirit of His Son, crying, ‘Abba, Father.'” Now, notice, it is the Spirit of God that cries-a most remarkable fact. Some are inclined to view the expression as a Hebraism, and read it, He “makes us to cry;” but, beloved, the text saith not so, and we are not at liberty to alter it upon such a pretence. We are always right in keeping to what God says, and here we plainly read of the Spirit in our hearts that He is crying “Abba, Father.” The apostle in Romans 8:15 says, “Ye have received the Spirit of adoption, whereby we cry, Abba, Father,” but here he describes the Spirit Himself as crying “Abba, Father.” We are certain that when he ascribed the cry of “Abba, Father” to us, he did not wish to exclude the Spirit’s cry, because in the twenty-sixth verse of the famous eighth of Romans he says, “Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit Himself maketh intercession for us with groanings which cannot be uttered.” Thus he represents the Spirit Himself as groaning with unutterable groanings within the child of God, so that when he wrote to the Romans he had on his mind the same thought which he here expressed to the Galatians,-that it is the Spirit Himself which cries and groans in us “Abba, Father.” How is this? Is it not ourselves that cry? Yes, assuredly; and yet the Spirit cries also. The expressions are both correct. The Holy Spirit prompts and inspires the cry. He puts the cry into the heart and mouth of the believer. It is His cry because He suggests it, approves of it, and educates us to it. We should never have cried thus if He had not first taught us the way. As a mother teaches her child to speak, so He puts this cry of “Abba, Father” into our mouths; yea, it is He who forms in our hearts the desire after our Father God and keeps it there. He is the Spirit of adoption, and the author of adoption’s special and significant cry. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1435.cfm